Flight crew of B727 on radar vectors to approach gets a GPWS alert when descending as cleared.

Attributes
ACN	385946
Time
Date	199711
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : tys
State Reference	TN
Altitude	msl bound lower : 2700 msl bound upper : 2700
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : tys
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : atp pilot : commercial
Experience	flight time last 90 days : 240 flight time total : 15000 flight time type : 8000
ASRS Report	385946
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : less severe other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : took evasive action
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

While on radar vectors in IMC conditions approaching ILS runway 23R tys, the GPWS aural and visual warning 'pull up' was displayed and heard. At the time of occurrence, aircraft altitude was approximately 2700 ft descending at approximately 150 FPM and cleared to 2500 ft. Evasive action was taken as per pom. Communication with approach controller terrain clearance. Approach continued to normal landing. GPWS item entered in maintenance logbook. Atl chief pilot notified.

Original NASA ASRS Text

Title: FLC OF B727 ON RADAR VECTORS TO APCH GETS A GPWS ALERT WHEN DSNDING AS CLRED.

Narrative: WHILE ON RADAR VECTORS IN IMC CONDITIONS APCHING ILS RWY 23R TYS, THE GPWS AURAL AND VISUAL WARNING 'PULL UP' WAS DISPLAYED AND HEARD. AT THE TIME OF OCCURRENCE, ACFT ALT WAS APPROX 2700 FT DSNDING AT APPROX 150 FPM AND CLRED TO 2500 FT. EVASIVE ACTION WAS TAKEN AS PER POM. COM WITH APCH CTLR TERRAIN CLRNC. APCH CONTINUED TO NORMAL LNDG. GPWS ITEM ENTERED IN MAINT LOGBOOK. ATL CHIEF PLT NOTIFIED.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.